Fix variable in release.gradle
diff --git a/release.gradle b/release.gradle
index c08379e..409eda6 100644
--- a/release.gradle
+++ b/release.gradle
@@ -30,7 +30,7 @@
             beforeDeployment { MavenDeployment deployment -> signing.signPom(deployment) }
 
             repository(url: "https://oss.sonatype.org/service/local/staging/deploy/maven2/") {
-                authentication(userName: sonatypeUsername, password: sonatypePassword)
+                authentication(userName: getMavenRepositoryUsername(), password: getMavenRepositoryPassword())
             }
 
             pom.project {